CN114658754B - Inner folding hinge applied to foldable electronic product - Google Patents

Abstract

The invention discloses an inner folding hinge applied to a foldable electronic product, which is characterized in that at least three rotating parts which are arranged at intervals are arranged on a torque arm, a cam piece and a spring piece can be clamped between any two rotating parts during assembly, and elastic force is applied to the cam piece through the spring piece, so that the cam piece and the rotating parts are kept in an engaged state, and a shaft piece can conveniently connect the torque arm, the cam piece and the spring piece in series to realize rapid assembly; in the assembly process, the cam piece and the spring piece can be effectively pre-fixed between the two rotating parts, so that the difficulty of assembly is not increased even if the number of the cam piece and the spring piece is increased; and need not to set up extra support and locking plate and come to hold up cam and spring spare, not only reduced the part quantity of hinge, reduced the complexity of hinge, still further reduced the equipment difficulty of hinge, it is convenient to popularize and apply for the infolding hinge.

Description

Inner folding hinge applied to foldable electronic product

Technical Field

The invention relates to the technical field of hinges, in particular to an inner folding hinge applied to a foldable electronic product.

Background

The existing foldable electronic products have two forms of outward folding and inward folding, and the main current folding mode is mainly the inward folding mode. The inner folding hinge is a core component for realizing the inner folding of a foldable product, and in order to promote folding handfeel, one or more groups of cam structures are usually arranged on the hinge in the prior art, when the rotating shaft rotates, the cam structures can be dislocated so as to compress a spring contacted with the cam structures, thereby obtaining good folding handfeel and a hovering function.

However, the cam structures adopted by the existing hinges are mutually independent, and as the number of groups of the cam structures increases, the assembly difficulty of the hinges can be increased by times, and the popularization and application of the inward folding hinges are affected.

Accordingly, improvements to the inner fold hinge are needed.

Disclosure of Invention

The invention aims to provide an inner folding hinge applied to a foldable electronic product, so as to simplify the structure of the inner folding hinge, reduce the complexity of the inner folding hinge and provide convenience for popularization and application of the inner folding hinge.

The technical scheme of the invention is as follows: the invention provides an inner folding hinge applied to a foldable electronic product, which comprises the following components: the device comprises two shaft members which are arranged in parallel, wherein each shaft member is provided with a torque arm, at least three rotating parts which are arranged at intervals are arranged on the torque arm, a cam member and a spring member are clamped between any two rotating parts, and an engagement structure is arranged on one surface of each rotating part, which is mutually attached to the cam member; the rotating part is coaxially and rotatably matched with the shaft piece, and the cam piece and the spring piece are coaxially and slidably matched with the shaft piece.

Optionally, cam members on both said shaft members are integrally connected.

Optionally, the rotating parts are uniformly arranged along the axial direction of the torque arm to form a rotating part array, and the rotating part array takes the midpoint of the torque arm as the center.

Optionally, the device further comprises track bases arranged at two ends of the shaft piece, and a fixed plate and a sliding plate corresponding to the torque arm; the first side of the sliding plate is rotationally connected with the first side of the fixed plate, the second side of the sliding plate is rotationally connected with the track base, and the axis of rotation of the second side of the sliding plate is positioned above the shaft pieces and between the two shaft pieces;

a radial extension part is arranged on one side of the torque arm, which is away from the rotating part, and the radial extension part is in sliding fit with the fixed plate;

optionally, the sliding direction of the radial extension is orthogonal to the axial direction of the shaft.

Optionally, a midline of the radial extension passes through a midpoint of the torque arm.

Optionally, the radial extension is parallel to the fixed plate.

Optionally, the radial extension is in the shape of a few words.

Optionally, a first protrusion is convexly arranged on a first side of the back surface of the sliding plate, and an arc-shaped arm is convexly arranged on a second side of the back surface of the sliding plate; the fixing plate is provided with a second protruding portion corresponding to the first protruding portion, the track base is provided with an arc-shaped groove corresponding to the arc-shaped arm, the second protruding portion is connected with the first protruding portion through a pivot, and the arc-shaped arm is clamped in the arc-shaped groove and can rotate around the axis of the arc-shaped arm in the arc-shaped groove.

Optionally, the cam member is provided with an axial extension part along the axial direction of the shaft member, and the axial extension part is elastically connected with a lifting plate; the periphery wall of the rotating part is provided with a bulge, and the bulge is contacted with the back surface of the lifting plate and lifts the lifting plate in a hinge unfolding state, so that the lifting plate is flush with the unfolding sliding plate.

The invention has the beneficial effects that:

through setting up the rotation portion of at least three interval arrangements on the torque arm, can press from both sides cam member and spring spare and establish between arbitrary two rotation portions during the equipment, exert elastic force to the cam member through the spring spare for cam member and rotation portion keep the interlock state, the shaft part of being convenient for concatenates torque arm, cam member and spring member together and realizes quick equipment.

In the assembly process, the cam member and the spring member can be effectively pre-fixed between the two rotating parts, so that the difficulty of assembly is not increased even if the number of the cam member and the spring member is increased.

And need not to set up extra support and locking plate and come to hold up cam and spring spare, not only reduced the part quantity of hinge, reduced the complexity of hinge, still further reduced the equipment difficulty of hinge, it is convenient to popularize and apply for the infolding hinge.

Drawings

Fig. 1 is a schematic structural diagram of a foldable electronic product according to the present invention.

Fig. 2 is a schematic folding view of the foldable electronic product of the present invention.

Fig. 3 is a sectional view showing a folded state of the foldable electronic product of the present invention.

Fig. 4 is an exploded view of an inner folding hinge in a foldable electronic product according to the present invention.

Fig. 5 is a schematic structural view of a torque arm and a cam member in the foldable electronic product of the present invention.

Fig. 6 is another cross-sectional view of the unfolded state of the foldable electronic product of the present invention.

Detailed Description

The invention will be described in detail below with reference to the drawings and the specific embodiments.

As shown in fig. 1-2, the present invention provides a foldable electronic product comprising a first part 20 and a second part 30, the first part 20 and the second part 30 being rotatably connected by an inner folding mechanism 10. The inner folding mechanism 10 is along the width direction of the foldable electronic product so that the first and second parts 20 and 30 can be unfolded or folded in the length direction of the product.

As shown in fig. 3 to 4, in the present embodiment, the inner folding hinge 10 includes a U-shaped bottom case (not shown), two ends of the bottom case are respectively provided with a first track base 101 and a second track base 102, and two first shaft members 107 and second shaft members 108 are disposed between the first track base 101 and the second track base 102 in parallel. A first torque arm 115 is provided on the first shaft member 107 and a second torque arm 116 is provided on the second shaft member 108.

Three first rotating parts (115 b, 115c, 115 d) arranged at intervals are arranged on the first torque arm 115, a first cam member and a first spring member 111 are arranged between the first rotating parts (115 b, 115 c), a first cam member 110a and a first spring member 113 are arranged between the first rotating parts (115 c, 115 d), a first engagement structure is arranged on the surface of the first rotating part 115b, which is attached to the first cam member, and first engagement structures (115 e, 110 c) are arranged on the surface of the first rotating part 115d, which is attached to the first cam member 110 a.

Similarly, the second torque arm 116 is provided with three second rotating parts arranged at intervals. A second cam piece and second spring pieces (112, 114) are clamped between two adjacent second rotating parts, and a second engagement structure is arranged on one surface, attached to the second cam piece, of each second rotating part.

As shown in fig. 5, in the present embodiment, the first cam member 110a and the second cam member 110b are integrally connected to form a second cam integrated member 110; the first cam integral piece 109 is formed in the same form, thereby further reducing the number of parts.

During assembly, one end of the first cam integrated piece 109 and the first spring piece 111 are clamped between the two first rotating parts (115 b and 115 c), the first end of the second cam integrated piece 110 and the first spring piece 113 are clamped between the first rotating parts (115 c and 115 d), the two ends of the first cam integrated piece 109 and the second spring piece 112 are clamped between the two upper second rotating parts, and the two ends of the second cam integrated piece 110 and the second spring piece 114 are clamped between the two lower second rotating parts; then, the first shaft member 107 sequentially passes through the first rotating portion 115b, one end of the first cam integrated member 109, the first spring member 111, the first rotating portion 115c, one end of the second cam integrated member 110, the first spring member 113, and the first rotating portion 115d, and similarly, the second shaft member 108 sequentially passes through the second rotating portion, both ends of the first cam integrated member 109, both ends of the second cam integrated member 110, and the second spring members (112, 114); and the first track base 101 and the second track base 102 are sleeved at two ends of the first shaft piece 107 and the second shaft piece 108, so that the assembly can be completed.

In the assembly process, the cam piece and the spring piece are clamped between the two rotating parts, the spring piece can apply elastic force to the cam piece, so that the cam piece and the rotating parts are kept in an engaged state, the cam piece and the spring piece can be effectively pre-fixed, the shaft piece can conveniently connect the torque arm, the cam piece and the spring piece in series to realize quick assembly, and the difficulty of assembly cannot be increased even if the number of the cam piece and the spring piece is increased.

Moreover, by adopting the structure, the cam and the spring piece are not required to be supported by an additional bracket and a locking plate, so that the number of parts of the hinge is reduced, the complexity of the hinge is reduced, the assembly difficulty of the hinge is further reduced, and convenience is brought to popularization and application of the inward-folding hinge.

In the above embodiment, the three first rotating portions (115 b, 115c, 115 d) are uniformly arranged in the axial direction of the first torque arm 115, forming a rotating portion array centered on the midpoint of the first torque arm 115. Specifically, the first rotating portions (115 b, 115 d) are provided at both end portions of the first torque arm 115, and the first rotating portion 115c is provided at an intermediate position of the first torque arm 115. Therefore, the damping units formed by the cam piece and the spring piece are uniformly arranged on the first torque arm 115 respectively, so that the torque received by the torque arm is relatively uniform.

In the above embodiment, the first fixing plate 117, the second fixing plate 118, the first sliding plate 119, and the second sliding plate 120 are provided on both sides of the base, respectively. Wherein the first fixing plate 117 is fixed to the first member 20 and the second fixing plate 118 is fixed to the second member 30. The first side of the first sliding plate 119 is rotatably connected to the first side of the first fixed plate 117, and two ends of the second side of the first sliding plate 119 are respectively rotatably matched with the first track base 101 and the second track base 102. The first side of the second sliding plate 120 is rotatably connected to the first side of the second fixed plate 118, and two ends of the second side of the second sliding plate 120 are respectively rotatably matched with the first track base 101 and the second track base 102. The axis of rotation of the second side of the first sliding plate 119 and the axis of rotation of the second side of the second sliding plate 120 are located above the shaft members and between the shaft members.

A first radial extension 115a is arranged on one side of the first torque arm 115, which is close to the first fixing plate 117, and the first radial extension 115a is in sliding fit with the first fixing plate 117; the second torque arm 116 is provided with a second radial extension 116a on a side thereof adjacent to the second fixing plate 118, the second radial extension 116a being in sliding engagement with the second fixing plate 118.

Therefore, when the first component 20 and the second component 30 are folded, the first fixing plate 117 and the second fixing plate 118 are close to each other, the first fixing plate 117 drives the first torque arm 115 to rotate, so that the cam structures between the first torque arm 115 and the first cam integrated piece 109 and the second cam integrated piece 110 are misplaced, and when the convex positions of the cam structures and the concave positions of the cam structures are opened and closed, the hinge enters a self-locking state, so that the first component 20 and the second component 30 can lock the current folding angle for use or storage by a user; when the cam structure is raised and the cam structure is raised, the hinge enters a free stop state, at which time the user can flexibly change the folding angle between the first member 20 and the second member 30.

As shown in fig. 3, when the first member 20 and the second member 30 are folded together, the ends of the first sliding plate 119 and the second sliding plate 120, which are close to the bottom case, are far away from each other, so that a water drop-shaped accommodating space is formed above the bottom case, and a larger space is reserved for the bending part of the flexible screen 40, so that the flexible screen 40 is protected from being damaged in the folding process of the product, and the service life of the product is prolonged.

In the above embodiment, the sliding direction of the first radial extension 115a is orthogonal to the axial direction of the first shaft member 107; likewise, the sliding direction of the second radial extension 116a is orthogonal to the axial direction of the second shaft member 108. Thus, the folding feeling of the hinge is ensured by effectively transmitting the external force applied to the first and second members 20 and 30 to the first and second torque arms 115 and 116 during folding.

In the above embodiment, the center line of the first radially extending portion 115a passes through the midpoint of the first torque arm 115, and the center line of the second radially extending portion 116a also passes through the midpoint of the second torque arm 116, so as to ensure that the external force can uniformly act on each of the first rotating portion and the second rotating portion.

In the above embodiment, the first radial extension 115a is parallel to the first fixing plate 117, and the first radial extension 115a is parallel to the first fixing plate 117. Thereby, the thickness of the first fixing plate 119 and the second fixing plate 120 can be made smaller, and the first radial extension 115a can be accommodated in the sliding groove 117a of the first fixing plate 117 and the second radial extension 116a can be accommodated in the sliding groove 118a of the second fixing plate 118 in the product unfolded state, so that the installation space required for the hinge is reduced, and the hinge can be applied to a small-sized foldable electronic product.

In the above embodiment, the first radial extension portion 115a and the second radial extension portion 116a are each provided in a shape of a letter, so as to increase the structural strength of the first radial extension portion 115a and the second radial extension portion 116a, and ensure the firmness of the hinge.

In the above embodiment, the first protruding portions (119 c, 119 d) are provided protruding on the first side of the back surface of the first slide plate 119, and the first arc-shaped arms (119 a, 119 b) are provided protruding on both ends of the second side of the back surface. Second protrusions (117 b, 117 c) corresponding to the first protrusions are provided on the first side of the first fixing plate 117, and arc grooves corresponding to the first arc arms (119 a, 119 b) are provided on the first track base 101 and the second track base 102. Thus, the first protruding parts (119 c, 119 d) and the second protruding parts (117 b, 117 c) are rotatably connected together through the pivots (121, 122), and the first arc-shaped arms (119 a, 119 b) are clamped in the arc-shaped grooves of the first track base 101 and the second track base 102.

The second sliding plate 120 is in a rotating fit with the second fixed plate 118, the first track base 101 and the second track base 102, and the description thereof will not be repeated again.

In the above embodiment, taking the second cam integrated member 110 as an example, the second cam integrated member 110 is provided with the axial extension portion 110d provided along the axial direction of the first shaft member 107, and the second cam integrated member 109 is also provided with the axial extension portion. A lifter plate 123 is elastically coupled to the first cam unit 109 and the second cam unit 110. Specifically, as shown in fig. 5 to 6, a receiving groove 110e is provided on the back surface of the axial extension 110d, a stud 123a inserted into the receiving groove 110e is provided on the elevating plate 123, a spring 124 is sleeved on the stud 123a, a screw 125 is inserted on the stud 123a, and the spring 124 is locked in the receiving groove 110e by a cap portion of the screw 125. In the folded state, the spring 124 applies an elastic force to the screw 125, and since the first cam unit 109 and the second cam unit 110 are fixed with respect to the bottom case, the spring 124 applies an elastic force directed to the bottom case to the lifting plate 123, so that the lifting plate 123 descends, and a larger space is further allowed for folding the folded portion of the product.

Meanwhile, protrusions 115f are provided on the first and second rotating parts 115c and 115f, which are in contact with the rear surface of the elevation plate 123 in the hinge-unfolded state and raise the elevation plate 123 to make the elevation plate 123 flush with the first and second sliding plates 119 and 120 after being unfolded against the elastic force of the springs 124.

In the above embodiment, the first gear base 103 is disposed on the side of the first track base 101 close to the first shaft 107, the second gear base 104 is disposed on the side of the second track base 102 close to the first shaft 107, the first gear set 105 is disposed on the first gear base 103, and the second gear set 106 is disposed on the second gear base 104. Meanwhile, teeth (not shown) are arranged on the outer peripheral walls of the first rotating parts (115 b, 115 c) and the second rotating parts, and the teeth on the first rotating parts (115 b, 115 c) and the teeth on the second rotating parts are engaged and matched through the first gear set 105 and the second gear set 106. Thus, the first torque arm 115 and the second torque arm 116 can realize synchronous action, and further realize synchronous folding and unfolding of the first member 20 and the second member 30.

The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (5)

1. The inner folding hinge comprises two shaft parts which are arranged in parallel, and is characterized in that each shaft part is provided with a torque arm, three rotating parts which are arranged at intervals are arranged on the torque arm, a cam part and a spring part are clamped between any two rotating parts, and an engagement structure is arranged on one surface of each rotating part, which is mutually attached to the cam part; the rotating part is coaxially and rotatably matched with the shaft piece, and the cam piece and the spring piece are coaxially and slidably matched with the shaft piece;

the rotating parts are uniformly arranged along the axial direction of the torque arm to form a rotating part array, and the rotating part array takes the midpoint of the torque arm as the center;

the track bases are arranged at the two ends of the shaft piece, and the track bases correspond to the torsion arm and comprise a fixed plate and a sliding plate; the first side of the sliding plate is rotationally connected with the first side of the fixed plate, the second side of the sliding plate is rotationally connected with the track base, and the axis of rotation of the second side of the sliding plate is positioned above the shaft pieces and between the two shaft pieces; a radial extension part is arranged on one side of the torque arm, which is away from the rotating part, and the radial extension part is in sliding fit with the fixed plate; and the centerline of the radial extension passes through the midpoint of the torque arm, the sliding direction of the radial extension being orthogonal to the axial direction of the shaft;

specifically, a first protrusion part is convexly arranged on a first side of the back surface of the sliding plate, and an arc-shaped arm is convexly arranged on a second side of the back surface of the sliding plate; the fixing plate is provided with a second protruding portion corresponding to the first protruding portion, the track base is provided with an arc-shaped groove corresponding to the arc-shaped arm, the second protruding portion is connected with the first protruding portion through a pivot, and the arc-shaped arm is clamped in the arc-shaped groove and can rotate around the axis of the arc-shaped arm in the arc-shaped groove.

2. The internal folding hinge for foldable electronic products as claimed in claim 1, wherein the cam members on the two shaft members are integrally connected.

3. An inner fold hinge for use in a foldable electronic product as claimed in claim 1, wherein the radial extension is parallel to the fixed plate.

4. An inner fold hinge for use in a foldable electronic product as claimed in claim 3, wherein the radial extension is in the shape of a few words.

5. The inner folding hinge applied to the foldable electronic product according to claim 1, wherein the cam member is provided with an axial extension portion arranged along an axial direction of the shaft member, and a lifting plate is elastically connected to the axial extension portion; the periphery wall of the rotating part is provided with a bulge, and the bulge is contacted with the back surface of the lifting plate and lifts the lifting plate in a hinge unfolding state, so that the lifting plate is flush with the unfolding sliding plate.

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